Compositions: ceramic – Ceramic compositions – Glass compositions – compositions containing glass other than...
Patent
1993-03-25
1995-03-07
Lovering, Richard D.
Compositions: ceramic
Ceramic compositions
Glass compositions, compositions containing glass other than...
25231501, 2523156, 2523157, 423592, 423608, 423630, 501 85, C03C 3097, C04B 3800, B01J 1300
Patent
active
053958055
ABSTRACT:
Transparent, monolithic metal oxide aerogels of varying densities are produced using a method in which a metal alkoxide solution and a catalyst solution are prepared separately and reacted. The resulting hydrolyzed-condensed colloidal solution is gelled, and the wet gel is contained within a sealed, but gas permeable, containment vessel during supercritical extraction of the solvent. The present invention is especially advantageous for making metal oxides other than silica that are prone to forming opaque, cracked aerogels.
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H. Hirashima and K. Sudo, "Structure and Physical Properties of V.sub.2 O.sub.5 Gels Containing GeO.sub.2 ", J. Non-Crystalline Solids, 121:68-71 (1990).
Pekala, R. W., Tillotson, T. M., Hair, L. M., and Hrubesh, L. W., "A Molecular Building Block Approach to Aerogels", Chemistry & Materials Science Research Report, UCID-20622-91-2, pp. 52-55, 1992.
Pekala, R. W., Hrubesh, L. W., and M. W. Droege, "A Molecular Building-Block Approach to New Aerogels with Improved Properties", Chemistry & Materials Science Research Report, UCID-20622-91-1, pp. 52-55, 1991.
Coronado Paul R.
Droege Michael W.
Hair Lucy M.
Grzybicki Daryl
Lovering Richard D.
Regents of the University of California
Sartorio Henry P.
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